New default behavior in Project view to directly open Tilesets in "Tilesets View".

I work with lots of Tilesets and prefer to have the Project View open to have a good overview about all my Tilesets as they are here listed in folders. The default dropdown (or scroll) list for Tilesets gets crowded too quickly, has no folders and is auto-sorted alphabetically.

Check Screenshot below.

AsIs:
A: Currently, when doubleclicking on a TSX file in the Project view, it is opened for editing it (like it would be the cases if I choose "Open with System Editor" through the context menu).

ToBe:
B: Instead, when doubleclicking on a TSX file in the Project view, it should directly be opened in the Tilesets view (like done with "Select in Tilesets View". So the User can directly start picking Tile from it to place it on the Map.

I'm sure most users would prefer this new default behavior with the doubleclick here because most Users most likely want to choose the Tileset to pick Tiles from it instead of editing the whole Tileset.

Hopefully an easy change, @bjorn ? :)

Start by locating the Project view handling for double-clicks on TSX files and compare it with the existing “Select in Tilesets View” action. Done means a double-click opens the selected tileset in Tilesets View for picking tiles instead of opening it for editing.